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Ultrafast photoinduced dynamics in quantum dot-based systems for light harvesting

Kaibo Zheng, Khadga Karki, Karel Ž赤dek and Tõnu Pullerits (*)

Department of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden

DOI 10.1007/s12274-015-0751-9

Nano Research 2015, 8(7): 2125每2142

Address correspondence to Prof. Tõnu Pullerits, tonu.pullerits@chemphys.lu.se

We review recent progress in the studies of ultrafast photoinduced dynamics in semiconductor colloidal nanocrystals and their composites with metal oxide acceptor systems. Electron and hole dynamics and trapping, multi-exciton processes, exciton dynamics, and their relevance for photovoltaics are discussed.

    

Ultrafast shape change and joining of small-volume materials using nanoscale electrical discharge

Cheng-Cai Wang1,5, Qing-Jie Li1,4, Liang Chen1,2, Yong-Hong Cheng2, Jun Sun1, Zhi-Wei Shan1 (*), Ju Li1,3(*), and Evan Ma1,4 (*)

1 Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi*an Jiaotong University, Xi*an 710049, China
2 State Key Laboratory of Electrical Insulation and Power Equipment, Xi*an Jiaotong University, Xi*an 710049, China
3 Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
4 Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
5 SJS Limited, 101 Xihuan Road, Jingzhou, Hubei 434024, China

DOI 10.1007/s12274-014-0685-7

Nano Research 2015, 8(7): 2143每2151

Address correspondence to Zhi-Wei Shan, zwshan@mail.xjtu.edu.cn; Ju Li, liju@mit.edu; Evan Ma, ema@jhu.edu

Using nanoscale electrical discharge-induced rapid joule heating, ultrafast welding of small-volume metallic materials is realized without introducing obvious microstructure change, which is distinct from bulk welding.

    

Gold nanoflowers for 3D volumetric molecular imaging of tumors by photoacoustic tomography

Yuanyuan Jiang1,∫, Zijian Deng2,∫, Dan Yang3, Xin Deng1, Qi Li1, Yinlin Sha3 (*), Changhui Li2 (*), and Dongsheng Xu1 (*)

1 Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2 Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
3 Single-molecule and Nanobiology Laboratory, Department of Biophysics, School of Basic Medical Sciences, and Biomed-X Center, Peking University, Beijing 100191, China
These authors contributed equally to this work.

DOI 10.1007/s12274-014-0688-4

Nano Research 2015, 8(7): 2152每2161

Address correspondence to Dongsheng Xu, dsxu@pku.edu.cn; Changhui Li, chli@pku.edu.cn; Yinlin Sha, shyl@hsc.pku.cn

Gold nanoflowers (AuNFs) are presented as a novel contrast agent for photoacoustic tomography (PAT). By binding folic acid (the molecular probe), the tail-vein injected AuNFs concentrated within the tumor site, which was clearly visualized by three-dimensional PAT imaging.

    

High-performance rigid and flexible ultraviolet photo- detectors with single-crystalline ZnGa2O4 nanowires

Zheng Lou, Ludong Li, and Guozhen Shen (*)

State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, ChineseAcademy of Sciences, Beijing 100083, China
These authors contribute equally to this work.

DOI 10.1007/s12274-015-0723-0

Nano Research 2015, 8(7): 2162每2169

Address correspondence to gzshen@semi.ac.cn

Rigid and flexible photodetectors fabricated with ZnGa2O4 nanowires showed good sensitivity, with good spectral responsivity and high external quantum efficiency. The flexible photodetectors had high mechanical flexibility and good folding strength, and are thus excellent candidates for flexible optoelectronic devices.

    

Serum-induced degradation of 3D DNA box origami observed with high-speed atomic force microscopy

Zaixing Jiang1,2,∫, Shuai Zhang2,∫, Chuanxu Yang2, Jørgen Kjems2, Yudong Huang1 (*), Flemming Besenbacher2, and Mingdong Dong2 (*)

1 Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China
2 Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000, Aarhus C, Denmark
These authors contributed equally to this study.

DOI 10.1007/s12274-015-0724-z

Nano Research 2015, 8(7): 2170每2178

Address correspondence to Yudong Huang, huangyd@hit.edu.cn; Mingdong Dong, dong@inano.au.dk

The degradation kinetics of 3D DNA box origami in serum using high-speed atomic force microscopy is demonstrated. Our findings provide valuable insights for further modifications to improve the biocompatibility of DNA nanostructures in future applications.

    

Raman microscopy mapping for the purity assessment of chirality enriched carbon nanotube networks in thin- film transistors

Zhao Li (*), Jianfu Ding, Paul Finnie, Jacques Lefebvre, Fuyong Cheng, Christopher T. Kingston, and Patrick R. L. Malenfant (*)

Security and Disruptive Technologies Portfolio, National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6, Canada

DOI 10.1007/s12274-015-0725-y

Nano Research 2015, 8(7): 2179每2187

Address correspondence to Zhao Li, zhao.li@nrc.ca; Patrick R. L. Malenfant, patrick.malenfant@nrc.ca

Raman microscopy mapping can be a powerful characterization tool to quantify residual metallic carbon nanotubes in high-density networks of enriched semiconducting single-walled carbon nanotubes.

    

Electrically tunable pore morphology in nanoporous gold thin films

Tatiana S. Dorofeeva, Erkin Seker (*)

Department of Electrical and Computer Engineering, University of California每Davis, Davis, CA 95616, USA

DOI 10.1007/s12274-015-0726-x

Nano Research 2015, 8(7): 2188每2198

Address correspondence to eseker@ucdavis.edu

Electrical current is used to tune pore morphology of nanoporous gold thin films at significantly lower temperatures than previously reported via electrically assisted mechanisms. This technique allows for precise control of the extent and location of pore coarsening, producing a wide range of distinct morphologies on a single substrate for high-throughput studies of structure每property relationships.

    

Mode-synthesizing atomic force microscopy for 3D reconstruction of embedded low-density dielectric nanostructures

Pauline Vitry1, Eric Bourillot1 (*), C谷dric Plassard1, Yvon Lacroute1, Eric Calkins2,3, Laurene Tetard2,3, and Eric Lesniewska1

1 Avenue Alain Savary UMR CNRS 6303, Physics Department, University of Bourgogne, 210786 Cedex, France
2 Nanoscience Technology Center, University of Central Florida, Orlando, FL 32826, USA
3 Department of Physics, University of Central Florida, Orlando, FL 32826, USA

DOI 10.1007/s12274-015-0728-8

Nano Research 2015, 8(7): 2199每2205

Address correspondence to eric.bourillot@u-bourgogne.fr

3D reconstruction of low density dielectric nanostructures embedded in a polymer layer has been achieved using mode synthesizing atomic force layer microscopy. The study suggest that with controlled tuning of imaging parameters, the new acoustic-based technique can surpass most common nanoscale technique to study changes in mechanical properties, with added depth resolution for volume imaging.

    

Tunable diameter electrostatically formed nanowire for high sensitivity gas sensing

Alex Henning, Nandhini Swaminathan, Andrey Godkin, Gil Shalev, Iddo Amit, and Yossi Rosenwaks (*)

Department of Physical Electronics, School of Electrical Engineering, Tel-Aviv University, Ramat-Aviv 69978, Israel

DOI 10.1007/s12274-015-0730-1

Nano Research 2015, 8(7): 2206每2215

Address correspondence to Yossir@eng.tau.ac.il

Tunable diameter electrostatically formed nanowire for use in a highly sensitive and robust room temperature gas-sensing device.

    

Germanium nanopyramid arrays showing near-100% absorption in the visible regime

Qi Han1, Yongqi Fu1 (*), Lei Jin1, Jingjing Zhao2, Zongwei Xu3, Fengzhou Fang3, Jingsong Gao2, and Weixing Yu4

1 School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
2 Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
3 Key Laboratory of Precision Measuring Technology & Instruments, Centre of Micro-Nano Manufacturing Technology, Tianjin University, Tianjin 300072, China
4 Institute of Micro & Nano Optics, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

DOI 10.1007/s12274-015-0731-0

Nano Research 2015, 8(7): 2216每2222

Address correspondence to yqfu@uestc.edu.cn

In the visible regime, the experimentally measured absorption of germanium nanopyramid arrays can reach 100%.

    

Chemically modified STM tips for atomic-resolution imaging of ultrathin NaCl films

Zhe Li1, Koen Schouteden1, Violeta Iancu1, Ewald Janssens1, Peter Lievens1, Chris Van Haesendonck1(*), and Jorge I. Cerd芍2 (*)

1 Solid-State Physics and Magnetism Section, KU Leuven, BE-3001 Leuven, Belgium
2 Instituto de Ciencia de Materiales, ICMM-CSIC, Cantoblanco, 28049 Madrid, Spain

DOI 10.1007/s12274-015-0733-y

Nano Research 2015, 8(7): 2223每2230

Address correspondence to Chris Van Haesendonck, chris.vanhaesendonck@fys.kuleuven.be; Jorge I. Cerd芍, jcerda@icmm.csic.es

A chemically modified scanning tunneling microscope (STM) tip is fabricated by picking up a Cl ion from the NaCl surface. In comparison with a bare metal tip, the Cl-functionalized tip yields enhanced resolution accompanied by contrast reversal in the STM topograph.

    

Localized magnetization reversal processes in cobalt nanorods with different aspect ratios

Marc Pousthomis1, Evangelia Anagnostopoulou1, Ioannis Panagiotopoulos2,3, Rym Boubekri1, Weiqing Fang2, Fr谷d谷ric Ott2 (*), Kahina Aït Atmane4, Jean-Yves Piquemal4, Lise-Marie Lacroix1 and Guillaume Viau1 (*)

1 Universit谷 de Toulouse, LPCNO, UMR 5215 INSA CNRS UPS, 135 av de Rangueil, 31077 Toulouse Cedex 4, France
2 Laboratoire L谷on Brillouin, CEA/CNRS UMR12, IRAMIS, CEA-Saclay, 91191 Gif sur Yvette, France
3 Department of Materials Science and Engineering, University of Ioannina, Ioannina 45110, Greece
4 Universit谷 Paris Diderot, Sorbonne Paris Cit谷, ITODYS, CNRS UMR 7086, 15 rue J.-A. de Baïf, 75205 Paris Cedex 13, France

DOI 10.1007/s12274-015-0734-x

Nano Research 2015, 8(7): 2231每2241

Address correspondence to Fr谷d谷ric Ott, frederic.ott@cea.fr; Guillaume Viau, gviau@insa-toulouse.fr

The diameter dependence of the coercivity of cobalt nanowires is quantitatively described through micromagnetic modeling, which reveals that the magnetization reversal is driven by nucleation at edges or at stacking faults.

    

Scalable nanomanufacturing of surfactant-free carbon nanotube inks for spray coatings with high conductivity

Colin Preston1, Da Song1, Jaiqi Dai1, Zois Tsinas2, John Bavier3,John Cumings1, Vince Ballarotto3, and Liangbing Hu1 (*)

1 Department of Materials Science and Engineering, University of Maryland College Park, College Park, Maryland, 20742, USA
2 Department of Bioengineering, University of Maryland College Park, College Park, Maryland, 20742, USA
3 Laboratory for Physical Sciences, 8050 Greenmead Drive, College Park, Maryland, 20740, USA

DOI 10.1007/s12274-015-0735-9

Nano Research 2015, 8(7): 2242每2250

Address correspondence to binghu@umd.edu

Proper modification of the few-walled nanotube surface enables a stable dispersion of nanotubes in isopropanol, and consequently an evenly dispersed spray-coated random network.

    

Three-dimensional multimodal sub-diffraction imaging with spinning-disk confocal microscopy using blinking/ fluctuating probes

Xuanze Chen, Zhiping Zeng, Hening Wang, and Peng Xi (*)

Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
These authors contributed equally to this work.

DOI 10.1007/s12274-015-0736-8

Nano Research 2015, 8(7): 2251每2260

Address correspondence to xipeng@pku.edu.cn

Three-dimensional imaging cannot be achieved easily using previously developed localization super-resolution techniques. Here, we present 3D-MUSIC, which is based on spinning-disk (SD) confocal microscopy and offers three-dimensional multimodal sub- diffraction imaging through the fluctuation of fluorescent probes.

    

Hexagonally arranged arrays of urchin-like Ag hemispheres decorated with Ag nanoparticles for surface-enhanced Raman scattering substrates

Haibin Tang1, Guowen Meng1,2 (*), Zhongbo Li1, Chuhong Zhu1, Zhulin Huang1, Zhaoming Wang1, and Fadi Li1

1 Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei 230031, China
2 University of Science and Technology of China, Hefei 230026, China

DOI 10.1007/s12274-015-0737-7

Nano Research 2015, 8(7): 2261每2270

Address correspondence to gwmeng@issp.ac.cn

A simple fabrication route is developed for hexagonally arranged arrays of urchin-like Ag hemispheres decorated with Ag nanoparticles for highly active and reproducible surface-enhanced Raman scattering substrates used in the rapid recognition of plasticizer and polychlorinated biphenyl.

    

Controlled building of CdSe@ZnS/Au and CdSe@ZnS/ Au2S/Au nanohybrids

Raquel E. Galian1 (*), Pilar Diaz1,†, Antonio Ribera1, Alejandro Rinc車n-Bertol赤n1, Saïd Agouram2, and Julia P谷rez-Prieto1 (*)

1 Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/ Catedr芍tico Jos谷 Beltr芍n 2, 46980 Paterna, Valencia, Spain
2 Department of Applied Physics and Electromagnetism, Dr. Moliner 50, Universidad de Valencia, 46100 Burjassot, Valencia, Spain
Present address: INNCEINNMAT S. L., Parc Cientific de la Universitat de Val豕ncia, c/Catedr芍tico Agust赤n Escardino 9-Edifico 3 CUE, 46980 Paterna, Valencia, Spain

DOI 10.1007/s12274-015-0738-6

Nano Research 2015, 8(7): 2271每2287

Address correspondence to Raquel E. Galian, raquel.galian@uv.es; Julia P谷rez-Prieto, julia.perez@uv.es

The efficiency of the preparation of ternary CdSe@ZnS/Au heterostructures by adding gold salts to CdSe@ZnS nanoparticles depends on the thickness of their ZnS shell. These heterostructures evolve thermally to give rise to novel quaternary CdSe@ZnS/ Au2S/Au structures. Surprisingly, prolonged irradiation of these heterostructures with visible light greatly enhanced their emission efficiency.

    

Broad negative thermal expansion operation-temperature window in antiperovskite manganese nitride with small crystallites

Jie Tan1,2, Rongjin Huang1 (*), Wei Wang1, Wen Li1,2, YuqiangZhao1,2, Shaopeng Li1,2, Yemao Han1,2, Chuanjun Huang1, and Laifeng Li1 (*)

1 State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China
2 University of Chinese Academy of Sciences, Beijing100049, China

DOI 10.1007/s12274-015-0740-z

Nano Research 2015, 8(7): 2302每2307

Address correspondence to Rongjin Huang, huangrongjin@mail.ipc.ac.cn; Laifeng Li, laifengli@mail.ipc.ac.cn

With decreasing crystallite size, the magnetic transition slows, and the negative thermal expansion operation-temperature window broadens.

    

Facile synthesis of PtCu nanowires with enhanced electrocatalytic activity

Wei Hong1,2, Jin Wang1,3 (*), and Erkang Wang1,2 (*)

1 State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
2 University of Chinese Academy of Sciences, Beijing 100039, China
3 Department of Chemistry and Physics, State University of New York at Stony Brook, New York, NY 11794-3400, USA

DOI 10.1007/s12274-015-0741-y

Nano Research 2015, 8(7): 2308每2316

Address correspondence to Jin Wang, jin.wang.1@stonybrook.edu; Erkang Wang, ekwang@ciac.ac.cn

A facile method for the synthesis of PtCu nanowires with a porous structure and high aspect ratio is demonstrated. The as-prepared nanowires present superior catalytic activity for methanol and ethanol electrooxidation.

    

High-efficiency CdTe/CdS core/shell nanocrystals in water enabled by photo-induced colloidal hetero-epitaxy of CdS shelling at room temperature

Hakimeh Zare1, Maziar Marandi2, Somayeh Fardindoost1, Vijay Kumar Sharma3,4, Aydan Yeltik3, Omid Akhavan1,5, Hilmi Volkan Demir3,4 (*), and Nima Taghavinia1,5 (*)

1 Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran 14588, Iran
2 Department of Physics, Faculty of Sciences, Arak University, Arak 38156-8-8349, Iran
3 Department of Physics, Department of Electrical and Electronics Engineering, and UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey
4 Luminous! Center of Excellence for Semiconductor Lighting and Displays, Microelectronics Division, School of Electrical and Electronics Engineering, and Physics and Applied Physics Division, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 639798, Singapore
5 Physics Department, Sharif University of Technology, Tehran 14588, Iran

DOI 10.1007/s12274-015-0742-x

Nano Research 2015, 8(7): 2317每2328

Address correspondence to Hilmi Volkan Demir, volkan@bilkent.edu.tr, hvdemir@ntu.edu.sg; Nima Taghavinia, taghavinia@sharif.edu

A CdS shell is formed on CdTe quantum dot (QDs) by a process involving ultraviolet (UV) dissociation of S2O3 2− ions in the presence of Cd2+ ions, resulting in a considerable increase in photoluminescent (PL) quantum yield.

    

Microwave-assisted synthesis of photoluminescent glutathione-capped Au/Ag nanoclusters: A unique sensor-on-a-nanoparticle for metal ions, anions, and small molecules

Jia Zhang1, Yue Yuan1, Yu Wang2, Fanfei Sun2, Gaolin Liang1, Zheng Jiang2, and Shu-Hong Yu1,3 (*)

1 Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
2 Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
3 Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China

DOI 10.1007/s12274-015-0743-9

Nano Research 2015, 8(7): 2329每2339

Address correspondence to shyu@ustc.edu.cn

Highly photoluminescent glutathione-capped Au/Ag nanoclusters were rapidly synthesized using a microwave-assisted method. Instead of acting as a sensor for one single target, the present nanoclusters respond to metal ions, anions, and small molecules, functioning as a unique sensor-on-a-nanoparticle.

    

Field-effect transistor with a chemically synthesized MoS2 sensing channel for label-free and highly sensitive electrical detection of DNA hybridization

Doo-Won Lee1,∫, Jinhwan Lee2,∫, Il Yung Sohn1, Bo-Yeong Kim3, Young Min Son4, Hunyoung Bark3, Jaehyuck Jung3, Minseok Choi5, Tae Hyeong Kim5, Changgu Lee2,3 (*), and Nae-Eung Lee1,3,4 (*)

1 Department of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, Gyunggi-do 440-746, Republic of Korea
2 Department of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyunggi-do 440-746, Republic of Korea
3 SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, Gyunggi-do 440-746, Republic of Korea
4 Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Republic of Korea
5 New Materials Team, Future Device R&D Department, LG Electronics Advanced Research Institute, Seoul 137-724, Republic of Korea
These authors contributed equally to this work.

DOI 10.1007/s12274-015-0744-8

Nano Research 2015, 8(7): 2340每2350

Address correspondence to Nae-Eung Lee, nelee@skku.edu;Changgu Lee, peterlee@skku.edu

Hybridization of single-stranded target DNA with single-stranded probe DNA molecules physically adsorbed on the MoS2-channel field-effect transistor results in the modulation of the drain current and threshold voltage (Vth). The negative shift in Vth is attributed to electrostatic gating effects induced by the detachment of negatively charged probe DNA after hybridization from the MoS2-channel surface.

    

Mesoporous Ag nanocubes synthesized via selectively oxidative etching at room temperature for surface- enhanced Raman spectroscopy

Lin Gan1, Meijia Yang1, Xi Ke2, Guofeng Cui2 (*), Xudong Chen1 (*), Shiva Gupta3, William Kellogg3, Drew Higgins4, and Gang Wu3

1 Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education of China, Sun Yat-sen University, Guangzhou 510275, China
2 Electronic Packaging Electrochemistry Laboratory, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
3 Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA 4 Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada

DOI 10.1007/s12274-015-0745-7

Nano Research 2015, 8(7): 2351每2362

Address correspondence to Guofeng Cui, cuigf@mail.sysu.edu.cn; Xudong Chen, cescxd@mail.sysu.edu.cn

Ag nanocubes with mesopores were synthesized by selectively etching agglomerated irregular Ag nanoparticles, and they demonstrated much improved surface-enhanced Raman scattering (SERS) properties relative to conventional Ag nanocubes.

    

Implications for photonic applications of diatom growth and frustule nanostructure changes in response to different light wavelengths

Yanyan Su1 (*), Nina Lundholm2, Søren M. M. Friis3, and Marianne Ellegaard1

1 Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
2 Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83S, DK-1307 Copenhagen K, Denmark
3 Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads 343, 2800 Kongens Lyngby, Denmark

DOI 10.1007/s12274-015-0746-6

Nano Research 2015, 8(7): 2363每2372

Address correspondence to Yanyan Su, yanyansu@plen.ku.dk

A novel method for modification of frustule nanostructure was developed and tested based on combination of six light wavelengths and two light intensities. Numerical simulations confirmed that the morphological changes obtained were sufficient to induce clear differences in the photonics properties of the frustule.

    

X-ray-induced radiophotodynamic therapy (RPDT) using lanthanide micelles: Beyond depth limitations

Sl芍vka Kašč芍kov芍1,2, Alexandre Giuliani1,3, Sara Lacerda4, Agn豕s Pallier4, Pascal Merc豕re1, 谷va T車th4, Matthieu R谷fr谷giers1 (*)

1 Synchrotron SOLEIL, L*Orme des Merisiers, 91190 Gif-sur-Yvette, France
2 Universit谷 Paris-Sud XI, UMR-S1193, 94800 Villejuif, France
3 INRA, UAR1008 Caract谷risation et 谷laboration des Produits Issus de l*Agriculture, 44316 Nantes, France
4 Centre de Biophysique Mol谷culaire, CNRS, Rue Charles Sadron, 45071 Orl谷ans Cedex 2, France

DOI 10.1007/s12274-015-0747-5

Nano Research 2015, 8(7): 2373每2379

Address correspondence to matthieu.refregiers@synchrotron-soleil.fr

Upon X-ray irradiation, lanthanide transfers visible energy to a photosensitizer, leading to local reactive oxygen species (ROS) production and triggering photodynamic therapy (PDT), even in deep tumors. The proposed nanolipoparticles, which contain both lanthanides and photosensitizer molecules, offer new opportunities in therapy and diagnosis.

    

Highly stable organic fluorescent nanorods for living- cell imaging

Minhuan Lan1,∫, Jinfeng Zhang1,∫, Xiaoyue Zhu1, Pengfei Wang2 (*), Xianfeng Chen1 (*), Chun-Sing Lee1, and Wenjun Zhang1 (*)

1 Center of Super-Diamond and Advanced Films (COSDAF), Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
2 Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry (TIPC), Chinese Academy of Sciences (CAS), Beijing 100190, China
These authors contributed equally to this work.

DOI 10.1007/s12274-015-0748-4

Nano Research 2015, 8(7): 2380每2389

cell imaging, organic dye, fluorescent nanorods, DPP Address correspondence to Wenjun Zhang, apwjzh@cityu.edu.hk; Xianfeng Chen, xianfeng_chen@hotmail.com; Pengfei Wang,wangpf@mail.ipc.ac.cn

Red fluorescent nanorods made of small organic molecules exhibit large Stokes shift, high stability, and low cytotoxicity, and can be applied for the imaging of living cells.

    

Influence of external electric field on piezotronic effect in ZnO nanowires

Fei Xue1, Limin Zhang1, Xiaolong Feng1, Guofeng Hu1, Feng Ru Fan1, Xiaonan Wen2, Li Zheng2 and Zhong Lin Wang1,2 (*)

1 Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
2 School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

DOI 10.1007/s12274-015-0749-3

Nano Research 2015, 8(7): 2390每2399

Address correspondence to Zhong Lin Wang, zlwang@gatech.edu

In the presence of an external electric field, the Schottky barrier height (SBH) is lowered by the image force, allowing more free carriers to pass through the metal-semiconductor junction and enhancing the screening effect on positive piezoelectric polarization charges. As the strength of the external electric field increases, the piezotronic effect is significantly suppressed and the metal- semiconductor contact finally exhibits Ohmic behavior.

    

Electrically pulsatile responsive drug delivery platform for treatment of Alzheimer*s disease

Li Wu1,2, Jiasi Wang1,2, Nan Gao1, Jinsong Ren1, Andong Zhao1,2, and Xiaogang Qu1 (*)

1 Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
2 University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100039, China

DOI 10.1007/s12274-015-0750-x

Nano Research 2015, 8(7): 2400每2414

Address correspondence to Xiaogang Qu,xqu@ciac.ac.cn

A novel bifunctional platform has been developed by integrating nonpharmacological and pharmacological cues into one system for AD treatment. This electrically responsive platform can realize on-demand controlled drug delivery. Electrochemical stimulation can be used to treat peripheral nerve injury (PNI) for stimulating neurite outgrowth. This novel system can also effectively inhibit A汕 aggregate formation, decrease cellular ROS, and protect cells from A汕-related toxicity.

    

Concave Cu-Pd bimetallic nanocrystals: Ligand-based Co-reduction and mechanistic study

Lan Zhang1, Hongyang Su1, Mei Sun1, Youcheng Wang1, Wenlong Wu1, Taekyung Yu2 (*), and Jie Zeng1 (*)

1 Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
2 Department of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea

DOI 10.1007/s12274-015-0752-8

Nano Research 2015, 8(7): 2415每2430

Address correspondence to Jie Zeng, zengj@ustc.edu.cn; Taekyung Yu, tkyu@khu.ac.kr

A novel protocol to synthesize Cu-Pd alloy nanocrystals with a controllable concave feature is reported by introducing a coordination ligand, i.e., decylamine, which can modify the reduction rates of Cu and Pd precursors to achieve co-reduction.

    

A cytotoxic amyloid oligomer self-triggered and NIR- enhanced amyloidosis therapeutic system

Can Xu1,2, Peng Shi1,2, Meng Li1,2, Jinsong Ren1 (*), and Xiaogang Qu1 (*)

1 Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
2 University of Chinese Academy of Sciences, Beijing 100039, China

DOI 10.1007/s12274-015-0753-7

Nano Research 2015, 8(7): 2431每2444

Address correspondence to Jinsong Ren, jren@ciac.ac.cn; Xiaogang Qu, xqu@ciac.ac.cn

Herein, a strategy for improving the efficiency of non-specific amyloidosis therapeutic drugs, by coating amyloid-responsive lipid bilayers, is reported. A hybrid graphene每mesoporous silica- supported lipid bilayer system was used as a drug carrier; the approach had drawn inspiration from the amyloid oligomer-mediated cell membrane disruption in the pathogenesis of amyloidosis.

    

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